@article{1028998718, author = {Kwun, Kyung Whan}, title = {Factors of $N$-space.}, journal = {Michigan Math. J.}, volume = {9}, number = {1}, year = {1962}, pages = { 207-211}, language = {en}, url = {http://dml.mathdoc.fr/item/1028998718} }
Kwun, Kyung Whan. Factors of $N$-space.. Michigan Math. J., Tome 9 (1962) no. 1, pp. 207-211. http://gdmltest.u-ga.fr/item/1028998718/